LR-Cal CPB5000-HP

Hydraulic - for high pressures
Pressure ranges from 25...4,000 to 25...5,000 bar
and from 365...60,000 to 365...70,000 psi
Accuracy ±0.02% or ±0.025% of measured value

LR-Cal CPB5000-HP
piston cylinder system

LR-Cal CPB5000-HP
dimensions

Description

LR-Cal CPB5000-HP description

Proven primary standard
Deadweight tester are the most accurate devices available on the market for the calibration of electronic or mechanical pressure measuring instruments. The direct measurement of the pressure (p = F/A), as well as the use of high quality materials allow a very small measurement uncertainty in combination with an excellent long-term stability of 5 years (recommendation according to the German Calibration Service (DAkkS). Pressure balances / piston manometers have been used for years in factory and calibration laboratories of industry, national institutes and research institutes.

Autarkic operation
Due to the integrated pressure generation (for measuring ranges up to 10 bar) as well as the purely mechanical measuring principle, the LR-Cal CPB5000-HP pressure balance is also ideally suited for on-site use, maintenance and service.

Basic principle
Pressure is defined as the quotient of force and area. Accordingly, the heart of the LR-Cal CPB5000-HP pressure balance (deadweight tester) is a very precisely manufactured piston/cylinder system that is loaded with mass supports to generate the individual test points.

The mass support is proportional to the target pressure and is achieved by optimally graduated disc weights. These disc weights are manufactured as standard to the standard acceleration of gravity of 9.80665 m/s², but can also be optionally adapted to their specific location of use and also DAkkS-calibrated.

Simple mode of operation
The pressure is adjusted via an integrated pump. For fine adjustment, a very precisely adjustable spindle pump with an internally running precision spindle is installed. As soon as the measuring system is then in the hovering state, there is a balance of forces between the pressure and the mass supports. Due to the excellent workmanship of the system, this pressure remains stable for several minutes, so that the pressure values for comparative measurement can be read off without any problems, or even longer adjustment work can be carried out on the test specimen.

Stable instrument design
With the maximum pressure model, calibrations up to a maximum pressure of 5,000 bar are possible.
It is built in a stable basement and offers exceptional ease of operation. With the integrated pre-pressure pump and 250 ml tank, even large test volumes can be easily filled and pre-compressed.

The two test ports are equipped with knurled nuts and interchangeable thread adapters with sealing cones. The following thread adapters with external threads are included in the scope of delivery:

M16 x 1.5 with sealing cone
M20 x 1.5 with sealing cone
9/16-18 UNF with sealing cone

Special features:

Total measurement uncertainty up to ±0.02% of measured value
With traceable factory calibration certificate as standard (option: DAkkS calibration certificate)
Very high long-term stability, recommended recalibration only every 5 years
Mass disks made of stainless steel, adaptation to local gravitational acceleration of the place of use possible without extra charge
Compact dimensions

Applications:

Primary standard for the measurand pressure, up to max. 5,000 bar (70,000 psi), hydraulic
Reference instrument for factory and calibration laboratories for testing, adjusting and calibrating pressure measuring instruments of all types
Self-sufficient complete system, also suitable for on-site use.

Piston cylinder system + mass set

LR-Cal CPB5000-HP piston cylinder system

The piston-cylinder system is screwed into the receptacle in the basement and has special ball bearings that ensure the excellent running characteristics with a high free rotation time and low sink rates and a very high long-term stability, even at high pressures and forces. The recommended recalibration cycle is therefore 5 years.

The materials of the piston and cylinder have very low coefficients of pressure and temperature expansion, which results in very good linearity of the effective piston cross-sectional area and high accuracy.

LR-Cal CPB5000-HP mass set

The standard set of measures (scope depending on the measuring range) is supplied in one to three storage cases. This contains measuring pieces made of non-magnetic stainless steel, which are optimally matched to daily use. For finer graduations or for a higher resolution, the use of a set of fine incremental weight set class M1 or F1 from the accessories is recommended.

If you do not use the instrument under reference conditions (ambient temperature 20°C, air pressure 1,013 mbar, relative humidity 40%), appropriate correction calculations must be applied.

The pulley weights are manufactured as standard to the standard acceleration of gravity of 9.80665 m/s², but can also be adapted to your local gravity (for model LR-Cal CPB5000-HP at no extra charge).

The mass tables (list of number and weight of the pulley weights included in the mass sets can be found in the data sheet, see DOWNLOADs.

Pressure ranges + specification

LR-Cal CPB5000-HP pressure ranges + specification

Measuring range 1)	bar	25...4,000	25...5,000
Required masses	kg	80	100
Smallest step (standard mass set) 2)	bar	2,5	2,5
Nominal cross-sectional area of the piston	cm²	0.02	0.02
Measuring range 1)	psi	350...60,000	350...70,000
Required masses	kg	83	97
Smallest step (standard mass set) 2)	psi	50	50
Nominal cross-sectional area of the piston	cm²	0.02	0.02
Accuracy 3) 4)	% of measured value	0.025 / optional 0.02
Pressure transmission medium	up to 4,000 bar / 60,000 psi: hydraulic fluid based on VG22 mineral oil (1 litre included in scope of delivery) 5,000 bar / 70,000 psi: Sebacate oil (0.5 litre included in scope of delivery)
Fluid reservoir	cm²	250
Test item connection	rotatable, including three male adapters M16 x 1.5 / M20 x 1.5 and 9/16-18 UNF
Material
Piston	hardened steel
Cylinder	Tungsten carbide
Set of masses	Stainless steel 1.4305, non-magnetic
Piping in instrument base	Stainless steel 1.4404, 6 x 2 mm
Permissible ambient conditions
Operating temperature	°C	18...28
Weights
High pressure basement	kg	32.5
Piston-cylinder system	kg	2.7 (5.0 incl. storage case)
BAR basic set of masses, case 1	kg	34.0	34.0
BAR basic set of masses, case 2	kg	27.5	27.5
BAR basic set of masses, case 3	kg	---	---
BAR basic set of masses, case 4	kg	---	---
BAR extension set of masses, case 1	kg	33.5	33.5
BAR extension set of masses, case 2	kg	---	23.5
PSI basic set of masses, case 1	kg	51.0	51.0
PSI basic set of masses, case 2	kg	15.0	15.0
PSI basic set of masses, case 3	kg	---	---
PSI basic set of masses, case 4	kg	---	---
PSI extension set of masses, case 1	kg	31.8	31.8
PSI extension set of masses, case 2	kg	---	17.8
Dimensions
Base	mm	W 460 x D 445 x H 265
Carrying case 1 for basic set of masses	mm	W 400 x D 310 x H 310
Carrying case 2-4 for basic set of masses	mm	W 215 x D 310 x H 310
Carrying case for extension set of masses	mm	W 215 x D 310 x H 310
Storage case for piston-cylinder system	mm	W 370 x D 150 x H 150
Approvals and certificates
CE conformity	Pressure equipment directive 97/23/EC (module A)
Calibration	Traceable factory certificate of calibration Optional: DAkkS-Certificate for single-piston versions or UKAS for dual-piston version

1) Theoretical starting value; corresponds to the pressure value generated by the piston (by its own weight). To optimise the operating characteristics, more weights should be loaded.

2) The smallest pressure change value that can be achieved based on the standard weight set. To reduce this, a set of trim-masses is available (see accessories).

3) The accuracy from 10% of the measuring range is based on the measured value. In the lower range, a fixed error based on 10% of the range applies.

4) Measurement uncertainty assuming reference conditions (ambient temperature 20°C, air pressure 1,013 mbar, relative humidity 40%). Corrections must be made if required.

Scope of standard supply

LR-Cal CPB5000-HP scope of standard supply

Base unit LR-Cal CPB5000-HP
Priming pump
Spindle pump for pressure build-up and fine pressure adjustment
Port for piston cylinder unit
Port for connecting unit under test, with 3 thread adapter: M16x1.5 + M20x1.5 + 9/16-18-UNF
Piston cylinder system, with bell
Basic mass set, in 2 transport and storage cases
Extension mass set in 1 case (range 4,000 bar) or 2 cases (range 5,000 bar)
Mass set calibrated on standard gravity 9.80665 m/s²
Special oil 1.0 liter (ranges up to 4,000 bar) or 0.5 liter (range 5,000 bar)
Open-end wrench SW 36 and SW 46
Factory calibration certificate (traceable)
Operating manual DE+EN

Options + accessories

LR-Cal CPB5000-HP options + accessories

Accoracy ±0.02%
of measured value

Code:
...-G2

Option:
Increased accuracy
±0.020% from the measured value

Calibration to special
local gravity

Code:
CPB5000-HP-GRV

Option (without surcharge):
Mass set manufactured to special local gravitational acceleration at the place of use of the device
(deviating from standard = 9.80665 m/s²)

DAkkS certificate
of calibration

Code:
CPB5000-HH-MP-DKD

Option:
DAkkS certificate of calibration
(instead of factory certificate 3.1B)

Inremental weight set
class F1

Code:
LDW-FMS-F1

Accessory:
Fine incremental weight set class F1
1 mg to 50 g

Incremental weight set
class M1

Code:
LDW-FMS-M1

Accessory:
Fine incremental weight set class M1
1 mg to 50 g

Basic information on pressure balances / deadweight tester see here...

LR-Cal CPB5000-HP deadweight tester / pressure balancehydraulic, up to 5,000 barAccuracy up to ±0.02% of measured value